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Dyfyniad Arddull ChicagoWiner,Russell S. Marketing Management. 3rd ed. New Delhi: Pearson Education, 2008.
Dyfyniad MLAWiner,Russell S. Marketing Management. 3rd ed. Pearson Education, 2008.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.